Portable speaker



FIG. 1 is a top, front perspective view of the portable speaker;

FIG. 2 is a bottom, rear perspective view of the portable speaker;

FIG. 3 is a front elevation view of the portable speaker;

FIG. 4 is a rear elevation view of the portable speaker;

FIG. 5 is a top plan view of the portable speaker; and,

FIG. 6 is a right elevation view of the portable speaker.

The broken line portions of the drawings are for illustrative purposes only and form no part of the claimed design. It is noted that, while FIG. 6 shows the right elevation view, the left elevation view is substantially identical and therefore, not shown. 

CLAIM I claim the ornamental design for a portable speaker, substantially as shown and described. 